万宝源斑岩型钼矿流体包裹体及成矿物质来源研究  

Fluid Inclusions and Origin of the Wanbaoyuan Porphyry Mo Deposit

作　　者：宋建潮[1,2] 贾三石[1] 王恩德[1] 胡铁军 王奎峰 

机构地区：[1]东北大学资源与土木工程学院,沈阳110004 [2]中国人民武装警察部队黄金第八支队,乌鲁木齐830057 [3]辽宁省有色地质局106队,铁岭112001 [4]山东省地质科学实验研究院,济南250013

出　　处：《地质与勘探》2009年第5期539-548,共10页Geology and Exploration

基　　金：辽宁省自然科学基金项目(编号:20072029);教育部博士点基金项目(编号:20060145032)联合资助

摘　　要：万宝源斑岩型钼矿位于辽东裂谷内,产于石柱子花岗闪长岩体及其后侵入的石英斑岩内。矿化类型可以分为浸染状、细脉充填状和石英脉状三种。为了解决该钼矿的成矿流体来源及矿床形成机制问题,我们从流体包裹体、REE、S、D-O同位素入手进行了研究。石英中的流体包裹体测试数据揭示:钼矿化可以分为三个阶段,高温阶段、中温阶段和低温阶段,以中温阶段为主。REE分析表明,成矿物质起源于花岗闪长岩体,后经分离结晶作用,最终与花岗闪长岩体表现出不同的REE配分模式;S同位素分析显示,S来源于岩体与地层,是一种混合硫;D-O同位素研究则说明,成矿流体是以岩浆水为主,后期有天水加入的混合流体。最后建立石柱子成矿系统,对石柱子花岗闪长岩内外接触带上的矿床成因进行了探讨。Wanbanyuan porphyry Mo deposit is located in Liaodong Rift and hosted by late Yanshanian Shizhuzi granodiorite body and later quartz porphyry. Mineralization types , according to host rocks and structure are divided into disseminated, veinlet - filled and quartz - vein ore. In order to solve the questions of ore- forming fluid source and ore -forming mechanism, fluid inclusions, REE, S and D- O stable isotope are studied. Vapor- liquid fluid inclusions data from quartz indicate that Mo mineralization experienced three stages ： high temperature, middle temperature and low temperature, and mid - temperature stage is the main stage. REE data shows Mo derived from granodiorite and finally resulted in different distribution patterns. S isotopic data suggest both origin of both diorite and wall rocks, a mixed source. D - O data shows the main ore fluid is mainly magmatic fluids, mixed with meteoric water. In the end, ore - froming mechanism around the granodiorite is discussed.

关 键 词：万宝源 钼矿 流体包裹体 REE 稳定同位素 

分 类 号：P618.65[天文地球—矿床学]